Blow-off connection for steam-boilers.



No. 818,775. PATENTED APR. 24, 1906.

P. MUELLER & J. 0. WHITE. BLOW-OFF CONNECTION FOR STEAM BOILERS.

APPLICATION FILED SEPT.15, 1905.

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UNITED STATES OFFICE.

PHILIP MUELLER AND JOHN C. WHITE, OF DECATUR, ILLINOIS, ASSIGNORS TO H. MUELLER MANUFAC'URING COMPANY, OF DECATUR, ILLINOIS, A CORPORATION OF ILLINOIS.

BLOW-OFF CONNECTION FOR STEAM-BOILERS.

Specification of Letters Patent.

Patented April 24, 1906.

Application filed Septembei 15,1905. Serial No. 278.672.

To a whom it may concern.-

Be it known that we, PHILIP MUELLER and JOHN C. \VHITE, residents of the city of Decatur, county of Macon, and State of Illinois, have invented certain new and useful Improvements in Blow Ofl' Connections for Steam-Boilers, of which the following is a specification.

The object of this invention is to provide means for securing easy access to the interior of the blow-off pipe of a boiler beyond the blow-oft valve for inspection and repairs and to also provide means for readily stopping any leakage which may develop in and through the blow-off valve by closing an emergency-valve at a point beyond the blowoii" valve and to accomplish this without obstructing the blow-off main or passage into which other boilers may be connected. The invention is particularly applicable to a blowoff main connected with a battery of boilers through the several pipes of the boilers, and it enables a leak in any particular boiler to be located and stopped until such time as the boiler is regularly out of service, when the proper repairs can be made. The stopping of a leak by the emergency-valve is accomplished without cutting the boiler out of service. The use of the emergency-valve is temporary, and the emergency-valve is not intended to take the place of the regular blow-off valve.

The invention is exemplified in the structure hereinafter described, and it is defined in the appended claims.

In the drawings forming part of this specification, Figure 1 is a horizontal section on line X X in Fig. 5. Fig. 2 is a plan of the device. Fig. 3 is a vertical section on line Y Y in Fig. 5. Fig. 4 is an end view of the device. Fig. 5 is a side elevation; and Fig. 6 is a perspective representation of the device, showing means for connecting the parts in use.

1 is a passage-Way which is connected into and forms a part of the blowofi' main. 2 is an enlargement of this passage into the form of a chamber open at the top.

3 is a movable cover for chamber 2 and is attached by means of the hinged lever 4 and the lugs 5, 6, and 7, and it is secured and made tight by the clevis 8 and screw 9.

10, 11, and 12 are pins for pivotally connecting the hinged lever 4 and clevis 8 to the lugs 5, 6, and 7.

A groove is shown at 13 in Fig. 3, into which packing 14 is fitted and held by the tongue formed on cover 3.

An opening into chamber 2 is shown at 15, to which blow-off pipe from boiler is connected, attachment being had in this case by 'lange 16 and bolt 17.

18 is a valve loosely secured to threaded stem 19 and free to turn on same.

20 is an extended and threaded opening in chamber 2, in which threaded stem 19 works.

21 is a hand-wheel rigidly secured to stem 19.

Opening 15 is extended into chamber 2 by suitable walls having their inner ends properly arranged to form a seat 22 for valve 18.

The openings 15 and 20 are axially coincident, and seat 22 and valve 18 are faced at right angles to their axes.

At 23, Figs. 1 and 4, is shown a disk of soft metallic or fibrous packing of suitable size and shape to be readily dropped into place between valve 18 and seat 22 and large enough to fully cover seat 22.

The operation of the invention is as follows: Referring to Fig. 6, a blow-off valve is shown at 24, connected by proper means to blow-off pipe 25 from the boiler and to opening 15 of the device through pipe 27. A blowofl main or passage is shown at 26, into which one or more boilers may be connected and which forms a continuation of passage 1. The device, being connected as described and shown, will ordinarily be used with the cover 3 fastened down, as in Figs. 2, 4, and 5, and valve 18 wide open, as in Figs. 1 and 3. If there are indications of a leak in the blow-off valve 24or valves, if more than one boiler is in use-and it is desired to locate the same, by unscrewing 9 and dropping clevis 8 cover 3 may be easily thrown back, as in Fig. 6, and the location and extent of the leak can be determined at once. To stop the leak, the disk 23 is held in place between valve 18 and seat 22, and by means of wheel 21 and stem 19 the valve is closed, and any irregularities in the face of either valve 18 or seat 22 due to corrosion or deposit are neutralized by the soft disk 23, and a tight joint is secured.

A stufling-box may be provided for stem 19, if desired.

What We claim as new, and desire to secure by Letters Patent, is

1. In a blow-01 i connection for steam-boilers, the combination of a bloW-ofi main, a boiler blow-ofl connection with the main, a valve to close the blOW-Ofi pipe, and a removable cap covering an opening adjacent to the connection of the pipe with the main.

2. In a blow-off connection for steam-boilers, the combination of a blow-off main, a boiler blow-off connection with the main, a valve in the main adapted to close the pipe and a removable cap covering an opening adjacent to the valve.

3. In a blow-0H connection for steam-boilers, the combination of a blow-off main, a boiler blow-off connection with the main, a valve-seat formed on the inner end of the connection of the pipe with the main, a valve closable against the seat and a cap covering an opening adj acent. to the valve and the seat, said cap being removable, substantially as described.

4. In a blow-ofi connection for steam-boilers, the combination of a blow-ofl main, having an enlargement, a boiler blow-off connection with the main, a valve-seat formed on the inner end of the pipe, a valve closable toward the seat, and adapted to support an insertible disk when engaging said seat, and a removable cap covering an opening in the enlargement of the main.

In testimony whereof we sign our names in 3 5 the presence of two subscribing witnesses.

PHILIP MUELLER. JNO. 0. WHITE.

Witnesses:

JOHN L. WADDELL, R. MUELLER. 

